2013高考英语备考：above/ over/on 用法说明

　　above, over, on

　　三个词都可以表示“在……上“，但用法不同。On表示与某物体表面接触;over表示在某物体垂直的上方，含“布满、覆盖、跨越”之意，与under 相对;above表示位置高于，但不一定垂直，与below相对。注意：与数字、数量、长度词连用时，多用over,同more than。如：over10,000people一万多人;表示年龄、刻度多用above，如a man above fifty五十开外的人;above zero零度以上。

　　习惯用语：well above average远在一般以上;above sea-level海拔以上;the one above上面的一个;above all首先，尤其重要的是;over there 那边;all over 遍及;over again 再一遍;over and over再三地

　　[应用]介词填空

　　①There lay an umbrella_______the table and some raincoats _____it.

　　②The mother held an umbrella______the boy’s head so that the sun wouldn’t burn him.

　　③ There seemed to be a war and many planes were flying____the city.

　　④The moon was______the trees in the east.

　　Key:①on,under ②over ③over ④above

　　above all 首先，特别是，最重要的是

　　after all 到底，毕竟

　　at all (用来加强语气)与not连用，表示“一点也不，完全不”。

　　in all 总共

　　all but 几乎，差点没(=almost,nearly)

　　①We have all but finished the work.

　　②The day turned out fine after all.

　　③Children need many things ,but above all they need love.

　　④He wasn’t at all tired.

　　⑤Do you feel ill at all(真的，确实)?

　　⑥There were twenty in all at the party.

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